Excellent and just in time. I've been stuck trying to choose between Spreedly, Chargify, Recurly etc. but they're so expensive by the time you factor in internet merchant accounts and payment gateways etc. I really want to hear more about Paypal recurring payments!

I'd love to see a future episode on advanced subjects such as failed payments, canceled subscriptions and importantly upgrades/downgrades between packages and the associated pro-rata calculations. Usually very complex stuff (in terms of business logic) but I'm sure it's a subject you can cover with relative ease given your style! :)